I'll be watching Alexandre Oliva's talk about Escaping the Surveillance Blackhole with Free Mobile Computing: https://www.fsfla.org/blogs/lxo/pub/0G
The stream should be available from https://debconf19.debconf.org/schedule/venue/1/ when it starts at 13:30 BRT Tuesday July 23 2019.
You can use this link to convert that time to your local time zone:
https://www.timeanddate.com/worldclock/fixedtime.html?msg=+Escaping+the+Surveillance+Blackhole+with+Free+Mobile+Computing+&iso=20190723T1330&p1=483&am=45
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